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ts-transform-default-export-1.0.3
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مشاهده بیشترتوضیحات
export default foo → export = foo → module.exports = foo
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | ts-transform-default-export-1.0.3 |
| نام | ts-transform-default-export |
| نسخه کتابخانه | 1.0.3 |
| نگهدارنده | ['axtgr'] |
| ایمیل نگهدارنده | ['adtomsk@gmail.com'] |
| نویسنده | Alex Schneider |
| ایمیل نویسنده | me@schneider.ax |
| آدرس صفحه اصلی | git+https://github.com/axtgr/ts-transform-default-export.git |
| آدرس اینترنتی | https://github.com/axtgr/ts-transform-default-export#readme |
| مجوز | ISC |
# ts-transform-default-export
[](https://www.npmjs.com/package/ts-transform-default-export)
[](https://github.com/axtgr/ts-transform-default-export/actions)
[](https://www.buymeacoffee.com/axtgr)
A TypeScript transformer that converts a default export such as one of these:
```ts
export default function foo() {}
export default foo
export { foo as default }
```
to its CommonJS counterpart:
```ts
export = foo
```
When such a module is then transpiled to CommonJS or UMD, the export will become `module.exports = foo`,
making the module consumable by `require('foo')` instead of `require('foo').default`.
This is useful when making a package compatible with both CommonJS and ES modules.
## Installation
`npm install --save-dev ts-transform-default-export`
## Usage
After the package is installed, you need to add it to your TypeScript compilation pipeline.
Currently there is [no native way to do it](https://github.com/Microsoft/TypeScript/issues/14419),
so you'll have to use a third-party tool ([TTypescript](https://github.com/cevek/ttypescript),
[ts-patch](https://github.com/nonara/ts-patch)) or a plugin for your bundler (e.g.
[rollup-plugin-ts](https://github.com/wessberg/rollup-plugin-ts)). For concrete instructions
refer to the docs of the tool of your choice. When adding the transformer, keep in mind
that its type is `program`, the most common one.
The transformer can be added to the `before` or `afterDeclarations` stages of compilation.
- When added to the `before` stage, it will transform only modules themselves. In this
case the resulting code will not match its type declarations.
- When added to `afterDeclarations`, it will transform only declaration files. This will
also produce mismatching type declarations. However, this can be useful if your build
tool transforms the modules for you (e.g. `rollup` with `output.exports = 'default'`)
and you want to make the declarations compatible.
- When added to both `before` and `afterDeclarations`, both modules and declarations
will be transformed. This is the most common case that produces matching files.
Only files that match the `files` or `include` property of your `tsconfig.json` will be
transformed. This is an intentional restriction to make it possible to control which files
are processed.
### Example `tsconfig.json` for TTypescript
```js
{
"compilerOptions": {
"module": "CommonJS",
"plugins": [{
"transform": "ts-transform-default-export",
"afterDeclarations": true,
"keepOriginalExport": true // Option of the transformer
}]
},
"include": ["src/index.ts"]
}
```
### Example `rollup.config.js` with `rollup-plugin-ts`
```js
import typescript from 'rollup-plugin-ts'
import transformDefaultExport from 'ts-transform-default-export'
export default {
input: 'src/index.ts',
output: [
{
dir: 'dist',
format: 'cjs',
sourcemap: true,
exports: 'default',
entryFileNames: '[name].js',
plugins: [],
},
{
dir: 'dist',
format: 'umd',
sourcemap: true,
name: 'lib',
exports: 'default',
entryFileNames: '[name].umd.js',
plugins: [terser()],
},
],
plugins: [
typescript({
transformers: ({ program }) => ({
afterDeclarations: transformDefaultExport(program),
}),
}),
],
}
```
## Options
### `keepOriginalExport`: boolean
Whether to keep the original default export in the code when transforming it. Useful
if you want to get a declaration file that is compatible with both CommonJS and ES modules.
- When `false` (default):
`export default foo` → `export = foo`
- When `true`:
`export default foo` → `export default foo; export = foo`
### `allowNamedExports`: boolean
Whether to throw when there are named exports in the module along with the default one.
This is important because when a default export is converted to `export =`, named exports
could get lost. For example, `export { foo as default, bar }` becomes `exports.bar = bar; module.exports = foo`,
so `bar` is overwritten.
You can work around this by assigning the named exports to the default export's value
if possible (`foo.bar = bar; export { foo as default, bar }`) and setting this option to true.
- When `false` (default):
`export { foo as default, bar }` → throws an error
- When `true` (and `keepOriginalExport` is `false`):
`export { foo as default, bar }` → `export { bar }; export = foo`
- When `true` (and `keepOriginalExport` is `true`):
`export { foo as default, bar }` → `export { foo as default, bar }; export = foo`
## License
[ISC](LICENSE)
زبان مورد نیاز
| مقدار | نام |
|---|---|
| 14.13.1 | Npm |
نحوه نصب
نصب پکیج tgz ts-transform-default-export-1.0.3:
npm install ts-transform-default-export-1.0.3.tgz